Fentanyl Overdose: What Bystanders Should Do Step by Step

Fentanyl overdose can kill in minutes. Fentanyl is 50 to 100 times stronger than morphine, and the margin between a dose that gets someone high and a dose that stops their breathing is dangerously thin. Over 73,000 Americans died from synthetic opioid overdoses in 2023, and fentanyl drove nearly all of those deaths. A bystander who recognizes the signs and acts immediately can reverse a fentanyl overdose before the brain is permanently damaged. You do not need medical training. You need naloxone, a phone, and the willingness to act.

What to Do in a Fentanyl Overdose

• Call 911 immediately. Do not wait to see if the person “comes out of it.”
• Administer naloxone (Narcan nasal spray or injectable naloxone) right away.
• Give rescue breaths if the person is not breathing. Tilting the head back clears the airway.
• A second naloxone dose may be needed for fentanyl because of its potency.
• Stay with the person until paramedics arrive. Naloxone wears off in 30 to 90 minutes.

Recognizing a Fentanyl Overdose

Fentanyl overdose looks different from being very intoxicated. The person is not sleeping. They are dying. Learn to tell the difference.

• Breathing slows or stops. This is the most dangerous sign. Count breaths. Fewer than 10 per minute or no breathing at all is an emergency.
• Lips and fingertips turn blue or gray. This means oxygen is not reaching the body.
• Pupils shrink to tiny pinpoints. Even in a dark room.
• The body goes limp. Muscles lose all tone.
• Choking or gurgling sounds. This is often described as a “death rattle.”
• The person cannot be woken up. Shouting, shaking, and a firm knuckle rub to the sternum produce no response.

Step-by-Step Overdose Response

Step 1: Call 911

Tell the operator someone is not breathing and you suspect an opioid overdose. Give your exact location. Most states have Good Samaritan laws that protect you and the person from drug-related prosecution when you call for help during an overdose. Do not let fear of legal consequences stop you from calling.

Step 2: Give Naloxone

If you have Narcan nasal spray, remove it from the package, tilt the person’s head back, insert the nozzle into one nostril, and press the plunger firmly. One press delivers the full dose. If you have injectable naloxone, inject it into the outer thigh or the upper arm muscle. If the person does not respond within 2 to 3 minutes, administer a second dose in the other nostril or another injection site.

Step 3: Give Rescue Breaths

If the person is not breathing, tilt their head back to open the airway. Pinch the nose closed. Give one breath every 5 seconds. Watch for the chest to rise. Continue until the person starts breathing on their own or until paramedics arrive. If you are not comfortable with mouth-to-mouth, chest compressions are better than nothing.

Step 4: Place in Recovery Position

Once the person is breathing, roll them onto their side with their top knee bent forward. This prevents choking if they vomit. Stay with them and monitor their breathing.

Fentanyl-involved overdoses may require multiple doses of naloxone to reverse. The CDC recommends carrying at least two doses. After naloxone is administered, the person may experience immediate withdrawal symptoms including agitation, nausea, and confusion. These symptoms are uncomfortable but not dangerous. Do not leave the person alone.

Why Fentanyl Overdoses Are More Dangerous

Fentanyl binds to opioid receptors with much higher affinity than heroin or prescription opioids. This means it shuts down breathing faster and may require more naloxone to reverse. People who use drugs purchased on the street may not know fentanyl is present. Counterfeit pills that look like legitimate prescription medications frequently contain lethal doses of fentanyl. One pill can kill.

The window between taking fentanyl and respiratory failure can be as short as 2 to 3 minutes. With heroin, that window is typically 10 to 30 minutes. Speed matters.

Good Samaritan Laws Protect You

Most states have enacted Good Samaritan laws that provide legal protection to people who call 911 during an overdose. These laws typically protect both the caller and the person experiencing the overdose from prosecution for drug possession. Check your state’s specific protections through the resources page, but do not use uncertainty as a reason not to call. A potential legal problem is always better than a preventable death.

After the Overdose: What Comes Next

Surviving a fentanyl overdose is a second chance. Use it. Talk to the person about treatment when they are stable and coherent. Contact a treatment program while the urgency is still fresh. An overdose reversal is a crisis point that often creates a window of willingness. That window closes quickly. Treatment works, and it starts with one phone call.